JP3217907B2 - Broadcast method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a broadcasting method for broadcasting from a broadcasting terminal device.

[0002]

2. Description of the Related Art Conventionally, simultaneous broadcasting using a public network is disclosed in Japanese Patent Application Laid-Open Nos. 3-7362 and 3-201.
As disclosed in Japanese Patent Publication No. 78, the line control device employs a method of transmitting simultaneous broadcast information to terminal devices to be broadcast simultaneously by accommodating subscriber lines for connection with each terminal device. I was taking it.

Another method is to limit the number of terminal devices to be connected simultaneously, record broadcast information on a recording medium such as a magnetic tape, and perform connection switching for each of the limited number of terminal devices. And a method of sequentially transmitting broadcast information.

[0004]

However, in the above-mentioned conventional simultaneous broadcasting method, a large-scale system is required in a method requiring a subscriber line for each target broadcasting terminal or in proportion to the number of terminal devices. At the time of construction, there is a problem that the system construction is difficult because the allowable number of simultaneous transmissions is limited depending on the public network equipment.

On the other hand, the method of sequentially broadcasting with the number of terminal devices connected at the same time limited requires a device for recording broadcast information and a time required to complete broadcasting to all the target terminal devices. There was a problem that it took.

The present invention solves such a conventional problem and provides an excellent broadcast capable of simultaneously broadcasting to a large number of terminal devices without requiring a device for recording broadcast information. It aims to provide a broadcasting method.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a broadcast terminal apparatus having a simultaneous broadcast function, a broadcast terminal apparatus, a plurality of trunks, and a plurality of trunk paths. A line control device that accommodates a voice multiplexing device for transmitting to the public network and is connected to the digital public network; and a plurality of communication transmission lines respectively connected to the public network for transmitting and receiving call information and at least one of transmitting and receiving control information. and a plurality of terminal devices having a control transmission channel, said plurality
Are divided into a plurality of groups, and when the broadcast terminal apparatus broadcasts simultaneously to the plurality of terminal apparatuses, each of the groups includes one of the plurality of trunks.
One out using the call setting information added to the selection information for selecting the destination identification information and the call transmission path of the terminal device with respect to responsibility <br/> meaning of the terminal device in said group from said line controller The terminal device transmits the call setting information to the control transmission line, selects one call transmission line for transmission, and selects another call transmission line for reception. And, to other control terminals in the group, call destination information of the other terminal devices and call setting information added with selection information for selecting a communication transmission line to the control transmission line, for transmission to the call transmission path of the 1, select the call transmission path of said other one for inbound, each group
To, send and receive call setup information and response through the control transmission channel between sequential terminals, the call transmission path of each terminal device wherein 1 for transmission, for incoming calls the transmission path of the other 1 selected, the line control unit which has received the call setting information from the final terminal of the group, as well as sends a response to the final terminal device, the glue to the broadcast terminal device
A plurality of notification that connection is completed the call transmission path terminals in flops, the broadcast terminal device, the connecting of the call transmission path of the plurality of terminal devices has been completed for each of the groups from the line controller Receiving the notification to the effect that the plurality of groups
By indicating that the connection of the call transmission path is completed for each, and by instructing the start of broadcasting from the broadcast terminal device, the
A plurality of trunks are looped through the voice multiplexing device.
And the groups form a loop
And connect the broadcast terminal device to the audio
And the plurality of terminals connected to the broadcast terminal device.
It is characterized in that the device is connected to a communication transmission line .

[0008]

With the above arrangement, the line control device transmits broadcast information to one terminal device, and does not require a device for recording the broadcast information. Broadcast information can be transmitted in a short time.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the broadcast method of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a system configuration diagram to which the broadcast method according to the present invention is applied. This system is an example in which ISDN is used as a digital public network.

Referring to FIG. 1, a broadcast system includes a line control device (hereinafter, referred to as LCU) 100, a broadcast operation terminal (hereinafter, referred to as BD) 200 as a broadcast terminal device, and an ISDN as a terminal device having a broadcast function. It comprises chain connect terminals (hereinafter referred to as TAs) 300-350.

LCU 100 and TA 300 to 500
The SDN 600 is connected to the ISDN basic interface lines (hereinafter, referred to as office lines) 500 to 570.

The LCU 100 is a communication path switch (hereinafter referred to as T).
SW) 101 and office line trunks (hereinafter referred to as ITC) 120 to 121 which are connection interfaces between office lines.
And a terminal control circuit (hereinafter referred to as LIN) 110 which is a connection interface with the BD 200, and a voice multiplex trunk (hereinafter referred to as CFT) for multiplexing voices of four parties.
130, a PB signal reception trunk (hereinafter, referred to as PBREC) 140, and a PB signal sound source (hereinafter, referred to as OSC) 15
0, a central control unit (CC) 102 for controlling the entire LCU 100, and a storage device (MM) 103 for storing a control program and the like.

FIG. 2 is a block diagram of the TA 300.

The TA 300 includes a station line interface (hereinafter, referred to as IF) 302 as a connection interface between the TSW 301 and the station line, a broadcast speaker (hereinafter, referred to as SPK) 400, and a microphone (hereinafter, referred to as MIC) 40.
An analog port control circuit (hereinafter, referred to as an AP) 303 which is an interface for connecting to the central control device (C)
C) 304 and a storage device (MM) 305.

Although not shown in FIG. 1, the analog port control circuit includes a PB signal receiving circuit and a PB signal sound source circuit.

The other TAs 310 to 350 also have the T
The configuration is the same as that of the A300, and as shown in FIG.
1, the SPK 420 and the MIC 421 are connected to the TA 320, the SPK 431 and the MIC 430 are connected to the TA 330, and the SPK 441 and the M MIC are connected to the TA 340.
The IC 440 has the SPK451 and the MI in the TA350.
C450 are respectively connected.

FIG. 3 shows a part of a key panel of a broadcast operation terminal (BD) 200. This BD 200 has various function buttons F1 to F7 as shown in FIG. (Not shown).

ISDN basic interface 500-5
Reference numeral 70 has an information channel (B1 channel, B2 channel) which is a communication transmission line for transmitting and receiving call information, and a control channel (D channel) which is a control transmission line for transmitting and receiving control information.

Also, the ITCs 120 and 12 of the LCU 100
1 controls the B1 channel as trunk number 1 and the B2 channel as trunk number 2.

The TA performs a chain connect grouping for each broadcast target area.

Next, a description will be given of the operation of simultaneous broadcasting of the embodiment constructed as described above.

Each of the TAs 300 to 350 shown in FIG. 1 is divided into a chain connect group for each broadcasting target area.

For example, group 1 is TA300, TA3
10, TA320, group 2 is TA330, TA
Assume that it is divided into 340 and TA350. The chain connect operation will be described in group 1 based on FIG.

FIG. 4 is a sequence diagram of the chain connect operation, and FIG. 5 shows the contents of an ISDN call setup (SETUP) message.

The broadcast is started by pressing the F1 (all broadcast) and F2 (broadcast call) keys shown in FIG. 3 on the key panel of the BD 200.

In the LCU 100, the F
1, the F2 key information is transmitted to the CC 102,
Performs broadcast processing.

First, the ITC 120 is allocated to the group 1 and the ITC 121 is allocated to the group 2, and transmission is performed to the groups 1 and 2. The group 1 will be described below with reference to FIG.

In FIG. 4, S001 indicates an incoming call from the LCU 100 to the TA 300.

As shown in FIG.
Edit the N Call Setup (SETUP) message and
Send message to 20 D channels and
The DN call setup procedure is performed through ISDN 600 and the TA
The call arrives at 300 and the SETUP message is transmitted.

The SETUP message, which is call setting information, adds the communication transmission path selection information to the M001 channel identifier information element shown in FIG.
Two channels are specified, the subscriber number of the TA 300 is set in the called number information element of M002 shown in FIG. 5, and the password and the chain connect group number for chain connect identification are set in the called sub address information element of M003 shown in FIG. Set. That is, destination identification information for specifying the destination is added to the call setting information.

On the other hand, SETUP transmitted to TA 300
ISDN6 is included in the channel identifier information element of the message.
Since the B channel is designated from 00, that channel is used for incoming calls. In this case, it is assumed that the B1 channel is used.

In S002 shown in FIG.
310 indicates an incoming call.

The TA 300 checks the password and group number of the destination subaddress information element of the received SETUP message, and if it is a broadcast, the SE 300 shown in FIG.
The TUP message is edited, a message is sent to the D channel of the IF 302 in FIG. 2, and the ISDN call setup procedure is performed through the ISDN 600, whereby the TA3
10 and a SETUP message is transmitted.

The SETUP message is composed of M0 shown in FIG.
01 that is not used in the channel identifier information element
Two channels are designated, the subscriber number of the TA 310 is set in the called number information element of M002 shown in FIG. 5, and the contents of the incoming call are directly set in the called sub address information element of M003 shown in FIG.

S003 shown in FIG.
A320 indicates an incoming call to A320.
0 indicates an incoming call to the LCU 100.

The operation of the TA 310 and the TA 320 is the same as that of the TA 300, and the description thereof will be omitted.

[0038] Since the B2 channel of the ITC 120 is used at the time of transmission, the B1 channel is specified in the channel identifier information element of the SETUP message at the time of reception from the TA 310 to the ITC 120.

C001 shown in FIG. 4 indicates a response from the LCU 100 to the TA 320.

The LCU 100 checks the password and group number of the destination subaddress information element of the SETUP message received through the ITC 120,
If the password and the group number of the destination sub-address information element of the SETUP message sent at the time of transmission from 0 match, the ISDN response (CONN) message is sent to the TA 320 from the D channel of the ITC 120.

C002 shown in FIG.
In response to A310, C003 sends TA310 to TA310.
In response to C300, C004 sends an LCU from TA300.
Each represents a response to 100.

FIG. 6 is a communication path control diagram of the TA 300.

The group 30 TA30 described below
0, TA310, and TA320 operate in the same manner.

When the TA 300 receives the CONN message from the destination of the chain connect, the TA 300 sets the communication path as shown in FIG.
Also, a CONN message is transmitted from the D channel to the receiving side.

The LCU 100 outputs the CON signal from the ITC 120.
When the N message is received, the BD 200 is informed of the completion of the chain connection of the group 1 as shown in FIG.
Is issued to the BD 200 to turn on the lamp of the F6 (group 1) key, and the BD 200 turns on the lamp of the F6 key.

The operation of group 1 described above is similar to the operation of group 2
The same applies to.

When the completion of the chain connection is indicated by turning on the lamps of the F6 and F7 keys of the BD 200 shown in FIG. 3, the F1 (broadcast start) key shown in FIG. , CFT
Through 130, they are connected to form one loop.

FIG. 7 shows groups 1, 2 and LCU 10
0, a communication path connection diagram with the BD 200.

In FIG. 7, when there is an arrow on the communication path of the TSW 101, it indicates that sound is transmitted only in that direction.

The sound from the BD 200 is P0 shown in FIG.
01, CFT130, P002, ITC1
20, TA300, TA310, TA320, ITC1
20, P003, ITC121, TA330, TA34
0, TA350, and P004 are transmitted in this order.

Thus, SPK400, SPK41
0, SPK420, SPK430, SPK440, SP
From K450, the broadcast audio of BD200 is transmitted.

When the chain connect terminal wants to transmit during a broadcast, for example, the TA 300 will be described. The TA 300 transmits a PB signal to the calling side B channel as a transmission request by dialing.

The PB signal reaches the CFT 130 via the broadcast channel, and is received by the PBR 140 via the channel P005 shown in FIG.

By receiving the PB signal, P00 shown in FIG.
The connection is changed so that the call can be transmitted only in the direction from the CFT 130 to the LIN 110 in the communication path 1 and the transmission from the BD 200 is disabled. That is, in this case, CFT13
Numeral 0 functions as a transmission switching means for setting the communication transmission path exclusively for receiving.

On the other hand, in order to enable transmission from the MIC 400, the TA 300 releases the communication path of P301 shown in FIG. 6 and makes the communication path as shown in FIG. This allows
Transmission from TA300 becomes possible.

When the BD 200 wants to transmit again from the TA 300, the F 200 (speaker change) key shown in FIG. 3 is pressed from the BD 200.

The LCU 100 releases the communication path P002 shown in FIG. 7, transmits a PB signal from the OSC 150 to the ITC 120, and reconnects the communication path P001 shown in FIG.

The PB signal is transmitted through the ITC 120 to the TAB.
When transmitted and received at 300, the communication path of TA 300 is as shown in FIG. As a result, the communication path state shown in FIG. 7 is established, and transmission from the BD 200 becomes possible again.

The simultaneous broadcast is ended by pressing the F4 (end) key shown in FIG. 3 from the BD 200.

The LCU 100 executes the ITC 12
An ISDN disconnection (DISC) message is transmitted to the D channel 0 and the ITC 121, and the communication paths P001 to P005 shown in FIG. 7 are released.

D001 shown in FIG.
Release to 0, D002 to release from TA300 to TA310, D003 to release from TA310 to TA320, and D004 to release from TA320 to LCU.

Note that TA300 and TA31 described below are used.
0, the operation of TA320 is the same.

When the TA 300 receives the DISC message, it releases the communication paths of P 300 and P 301 shown in FIG. 6 and sends the DISC message to the chain connect destination through the D channel. Thereby, LC
When U100 receives the DISC message from ITC 120, U100 releases the allocation of ITC 120. As a result, the simultaneous broadcasting ends.

Although the above embodiment has been described on the assumption that the number of groups is two, the present invention is not limited to this. For example, in the case of three or more groups, only the communication paths of P003 shown in FIG. 7 are connected by the number of groups, and only the communication paths are changed depending on the number of groups.

The connection between the LCU 100 and the network is established by the IS
In the case where the DN basic interface is replaced with the primary group interface, it can be realized by allocating a communication path to a B channel used for each of outgoing and incoming calls as shown in FIG.

Further, as a digital public network, DDX
Other lines can be used. However, in this case, since the broadcast information to be transmitted is digital information, a predetermined encoded code is transmitted and TA information is transmitted.
There is a method of decoding this on the side to generate an audio signal and the like.

[0067]

As described above, according to the broadcast method of the present invention, a device for recording broadcast information is not required, and the limitation by the allowable number of transmissions by the public network equipment can be taken into consideration. Broadcasting can be performed on a large scale, and the connection completion time can be shortened.

Also, by reducing the number of lines required for simultaneous broadcasting, the line maintenance cost for the user is reduced, and the line control device can be reduced in capacity, thereby reducing the installation cost.

Further, since it is possible to receive a transmission request from a terminal device during simultaneous broadcasting, it is possible to use the system as a conference system and to extend the use of the system.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram to which a broadcast method according to the method of the present invention is applied.

FIG. 2 is a block diagram of a TA 300 according to the present embodiment.

FIG. 3 is a diagram illustrating a part of a key panel of the broadcast operation terminal according to the embodiment.

FIG. 4 is a sequence diagram showing a chain connect operation in the embodiment.

FIG. 5 is a diagram showing contents of a call setting message in the embodiment.

FIG. 6 is a communication path control diagram of the chain connect terminal in the present embodiment.

FIG. 7 is a communication path control diagram of the line control device in the present embodiment.

FIG. 8 is a communication path control diagram of the chain connect terminal in the present embodiment.

FIG. 9 is a communication path control diagram of the line control device in the present embodiment.

[Explanation of symbols]

 Reference Signs List 100 Line control unit (LCU) 200 Broadcast operation terminal (BD) 300-350 Chain connect terminal (TA) 400-450 Speaker (SPK) 401-451 Microphone (MIC) 500-570 ISDN basic interface 600 ISDN

Claims (2)

(57) [Claims] 1. A broadcast terminal device having a broadcast function,
A line control device that accommodates the broadcast terminal device, a plurality of trunks, and a voice multiplexing device for transmitting voice of one voice channel to the voice channels, and is connected to a digital public network;
Respectively and a plurality of terminal devices having at least one control transmission line for transmitting and receiving multiple calls transmission path and the control information for transmitting and receiving the connected call information to the public network, the
A plurality of terminal devices are divided into a plurality of groups, and when the broadcast terminal device broadcasts simultaneously to the plurality of terminal devices, the plurality of transponders are provided for each of the groups.
The group from the line controller using one of the
Any call setting information added to the selection information for selecting the destination identification information and the call transmission path of the terminal device to the terminal device of the inner and transmitted to the control transmission channel, for transmitting a call transmission path The other one of the call transmission paths is selected for receiving a call, and the terminal device having received the call setting information sends a response to the line control device and transmits the response to the other terminal devices in the group. The call setting information to which the destination identification information of the other terminal device and the selection information for selecting the communication transmission path are added is sent to the control transmission path, and the one communication transmission path is used for transmission.
The other one call transmission path is selected for receiving a call, and call setting information and a response are sequentially transmitted and received between the terminal apparatuses via the control transmission path for each of the groups. The line control device, which selects a transmission line for transmission and the other one of the call transmission lines for reception and receives call setting information from the last terminal device in the group , responds to the last terminal device. sends out a, a notification that connection of the call transmission path <br/> plurality of terminals of said group to the broadcast terminal is completed, the broadcast terminal device, the glue from said line controller
When the notification that the connection of the communication transmission lines of the plurality of terminal devices is completed is received for each of the groups, the completion of the connection of the communication transmission lines is displayed for each of the plurality of groups , and the broadcast terminal device starts broadcasting. By instructing the plurality of trunks via the voice multiplexing device.
The plurality of groups are connected in a loop
And the broadcast terminal device in front.
Connected to the audio multiplexing device, and connected to the broadcasting terminal device and the multiplexing device.
And characterized in that the connection between the call transmission path number of terminal devices
Simultaneously broadcast how to. 2. A transmission request receiving means for receiving transmission request information comprising a push button signal from the plurality of terminal devices, and a transmission switching means for setting a communication transmission path exclusively for reception. Wherein, during the connection of the communication transmission line, among the plurality of terminal devices,
When the transmission request information is received from the arbitrary terminal device by the transmission request unit, the communication transmission line connecting the line control device and the broadcast terminal device is set to receive only using the transmission switching unit. The broadcast method according to claim 1, wherein: